I’m no expert but i took a punt and it cost £30 from a motor factors for the part rather than £100 from Audi, if the switch still works and the air con comes on but just blows cold it should sort it
Hi, my audi s5 b8 suddenly blow hot air while my car is parking, and stop blowing cold air. Even I off my car for few hours it’s still the same no cold air. Could it be sensor problem or something else?